Valve device for internal-combustion engines.



A. G. DAM & A. MARSHALL. VALVE DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLIOATION FILED JUNE 19, 1912.

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. Ill/VEIl/TORS A. o. DAM & A. MARSHALL. VALVE DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JUNE 19, 1912.

Patented July 29, 1913.

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ANDREW C. DAM AND ALFRED MARSHALL, OF NEW YORK, N. Y.

I Specification of Letters Patent.

Patented July 29, 1913.

Application filed June 19, 1912. serial in). 704,561.

To all whom it may comm t, a

Be it known that we, ANDREW C. DAM

and AL RED illARSHALL, both citizens of the- United State's and residing 1n the city,. county, and State of New York, have -invented certain new and useful Improvements in Valve Devices for Internal-Combustion Engines, of which the following is a specification, e'eference being had to .the accompanying drawings, whichform a part thereof,

. engine provided with Fig. 2 andshowin'g the upper end of a cyl-, inder provided with meet our valve de'- This invention, relates to valve devices for internal combustion engines.

The invention seeks to provide a valve device of the rotary type which shall have the advantage of a quick opening of the valve ports to their maximum and a quick closing of the ports.

The invention also. seeks to provide a valve device otthe. rotary type in which the leakage of gas shall be efl'ectually prevented or reduced to a minimum.

The invention further seeks to provide an efiicient arrangement for water cooling that part of the valve device which is most exposed to the firing.

' In the accompanying drawings forming .part of this'speeification, and in which like reference numerals designate corresponding parts, Figure 1 is a side elevation, partly in section, of a four cycle interna'l combustion our rotary valves. Fig. 2 is a horizontal section taken on the line 2-2 of Fig. -1. Fig.3 is an enlarged vertical section taken on the line 33 of vices. Figs. 4 and 5 are vertical sectional elevations of the valve elements included in the valve device, Figs. 6 and 7 are pcrspective views of these valve elements. Fig. 8 is a plan View showing a modified formof one of said elements, ahd Fig. 9 is a vertical sectional elevation taken on the line 9 9 reef Fig. 8.

Referring now to the. particular embodiment of the invention, as shown in the drawings, 1 and 2 are the cylinders of the enginewhich are preferably made in one casting as-shown. I

'3 is the piston of cylinder 1. The pistons are operated in the usual manner from the nrankshaft 1. The cylinder 1 near its upper end or-head is provided with the inlet port. 5 andthe exhaust port 6 which are con trolled by the valve device for this cylinder.

The valvedevice consists of two superposed cylindrical valve-members 7 and 8, the valve-member 7 being provided with a flange 9 which surrounds the periphery of the valve-member 8.

10 is a ported plate which rests on the annular shoulder 11 formed in the inner periphery of the cylinder. Stepped on this plate is the valve shaft 12 to which is rigidly secured the valve-member S. The valvesliaft 12 extends outward through the valve member 7 and is provided with a beveled gear 13. Valve-member 7 is provided with a beveled gear 14 which surrounds valve shaft 1'2. Gears 1:3 and 14 are driven in op.- posite directions by beveled gear 15 fixed on the drive. shaft 16 which turns in a bearing 17 fixed to the upper end of the cylinder. The valve-members are held in place within the cylinder by the removable plate 18 which is bolted to the end of the cylinder. The valve-member 7 is provided with an inlet port 19 through thefiange 9 and the valve-.

member?) is provided with an inlet port 20' which opens through the periphery and through the lower face thereof and is adapted to register with the port 19. The ports-19 and 20 register with the inlet port 5. Valve-member 7 is also provided with an exhaust port 21 which opens through its periphery above'the flange 9 and registers with the cylinder exhaust port 6. This port 21 also opens through the lower face of the valve-member 7 and registers wlth the exhaust port 22 of valve-member 8 which e3:-

-tends entirely through this valve-member.

Theplate 10 which is fixed securely in place has a port, not shown, which registers with port 20 and a port 23 which registers with port 22. When the inlet ports 19 and 20 register with each otheuuud with the cylinder port- 5, gas is admitted to the cylinder. hen the exhaust ports 21 and 22 register with each other and with cylinder port 6 the combustion products are exhausted from the cylinder. It will be seen that, by the arrangement of the valve-members described and their rotation in opposite directions, a a

very quick opening of the ports to their maximum and a very quick closing of the ports takes place thereby enabling the cylinder to be very quickly charged andexhausted. The plate 10-not only supports the valve-memberstut, acting in con unc-' tion with its shoulder '11, serves to prevent the escape of gas around the periphery of chambers 29 and 30 which are separated by center.

the valve-member 7. It also protects the exposed valve-member 8 from injury arising from the explosions.

In the timing of the valve device with reference to the stroke of the piston, the exhaust closes when the shaft crank is on center. When the crank has moved through 10 the intake opens and upon the further crank movement ofl80 the intake closes; The compression stroke begins when the inlet valve closes and ends when the crank is on center. The firing stroke begins withthe crank on center and ends when the crank has moved through 140. The exhaust then opens and closes when the crank is on" The engine shown in the drawings is of the twin cylinder type and'the valve device 24 in cylinderi2 is identical with the valve device of cylinder 1 and is similarl arranged and operated by drive she 25. Drive shafts 16 and 25 are actuated-by a counter-shaft 26 geared with shaft 27 which is geared with crank shaft 4.

In Figs. 8 and 9 the inner valve-member and its shaft are shown in modified form to provide for water-cooling of the valve-membr. This valve-member 28 corresponds to the valve-member 8. The imperforate part of the valve-member is provided with two a plate, 31 havingia port 32 connectingfthe chambers. The valve-member is secured to a shaft 33 provided'with two longitudinal passageways 34 and 35. The passageway 34 connects with the chamber 29'through the port 36 and the passageway 35 connects with thechamber 30 through the port 37. The upper end of the passageway 34 connects with the inlet pipe 38 and the uper end of the passageway 35 connects wit the outlet pipe 39. i The circuit of the, water is from pipe 38 through passageway 34:, port 36, chamber 29, port 32, chamber 30, port 37, passageway 35 and out through the pipe 39. The shaft 33 is driven by means of the beveled gear 40 which corresponds to the beveled 'gear 13 in Fig. 3. The. u perend of this shaft turns in a bearing w ich is provided in the head or coupling 41..

While we have shown the various features of the invention in what we consider to be their best form, it is to be understood that various changes in the embodiment of the invention may be made without departing from the scope of the invention.

What we claim is:

1. In a valve device for internal combustion engines, the combination of a piston cylinder having inletand exhaust ports, two superposed cylindrical valve-members controlling said cylinder ports, one of said valve-members being provided with a peripheral flange surrounding the periphery of the other valve-member, said valve-members having inlet and exhaust ports adapted to register with each other; and means for rotating the valve-members in opposite directions.

2. In a valve device for internal combustion engines, the combination of a piston cylinder having inlet and exhaust ports, two

superposed cylindrical valve-members con- -with; and means for rotating the. valvemembers in opposite directions. I

3. In a valve device for mternal combustion engines, thelcombination of a piston cylinder having inlet'and exhaust ports in its side wall. near the head, two superposed cyj lindrical valve-members ,closing the. head of the cylinder and controlling said cylinder ports, one 6f said valve-members being provided with a peripheral flange surrounding the periphery of the other valve-member, the flanged valveemember having-inlet and exvalve-member having corresponding ports to register-therewith; and means for rotating the valve-members in o posite directions.

'4. In a yalve device fin internal combustion engines, the combination of 'a piston cylinder having inlet and exhaust portsin its side wall near the head, two superposed cylindricalvalve-members closing the head of the cylinder and controlling said cylinder ports, one of said valve-members being rovided with a peripheral flange 'surroun ing the periphery of the other valve-member, the

'flanged valve-member having inlet and ex haust ports inits periphery andv the other valve-member having corresponding ports to register therewith; a stationary ported plate within the cylinder between the explosionchamberthereof and the valve-members; a valve shaft fixed to the innermost valvemember and extending outward through the.

outermost valve-member; and a drivin shaft-havmg provislon .forengaging sai valve shaft and outermost valve-member and haust ports in' its periphery and the other operating to rotate-the valve-members in opposite directions.

5.. In a valve device for internal combustion engines, the combination of a piston cylinder having inlet and exhaust ports in its side wall near thehead, two superposed cylindrical valve-members closing the head of the cylinder and controlling said cylinder ports, one ofsaidvalve-members'being provided with a peripheral flange surrounding the periphery of theother valve-member, the flanged valve-member having inlet and exhaust ports in itsiperiphery andthe other valve-member having corresponding ports to register therewith; a shoulder formed on the inner wall'of the cylinder; a stationary ported plate resting on said shoulder in contact with the valve members; a valve-shaft stepped in said plate and fixed to the innermost valve-member and extending outward through the outermost valve-member; and a drivin shaft having provisions for engaging sald valve-shaft and outermost valve: member and operating to drive said valvemembers in opposite directions.

6. In a valve deviceforinternal combustion engines, the combination of a rotary valve disk provided with a plurality of communicating chambers; and a shaft secured to said valve disk and having formed therein inlet and outlet passageways which respec= tively communicate with said chambers for the flow of Water to and from thechambers of the valve.

This specification signed and witnessed this 12th day of June, A. 1)., 1912.

ANDREW ,G. DAM. ALFRED MARSHALL. Witnesses:

E. M. TAYLOR, WORTHINGTON CAMPBELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

i Washington D. G. 

